Punnett Squares and Probability

Quiz
•
Science
•
7th Grade
•
Hard
Standards-aligned
Laura Sweeney
Used 32+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring?
bb x bb
Bb x Bb
BB x bb
BB x BB
Tags
NGSS.HS-LS3-2
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In pea plants, the trait for green seed pods (G) is dominant over the trait for yellow seed pods (g). Which cross will produce the maximum number of offspring with green seed pods?
GG × gg
Gg × gg
Gg × Gg
gg × gg
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Short tails (T) are dominant to long tails (t). What is the probability of a long-tailed mouse in the cross Tt x tt?
25%
50%
75%
100%
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In pea plants, purple flowers are dominant over white flowers. A plant that is homozygous for purple flowers is crossed with a plant homozygous for white flowers.
If the offspring from this cross are allowed to self-pollinate (cross with themselves), what will be the ratio of purple to white flowers in the second generation?
2:2
4:0
1:3
3:1
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The Punnett square shows a cross between a heterozygous tall (Tt) and a homozygous short (tt) pea plant.
What are the correct genotypic and phenotypic ratios of the resulting offspring?
genotype: 1:1; phenotype: 1:1
genotype: 2:1; phenotype: 1:2
genotype: 3:1; phenotype: 3:3
genotype: 4:1; phenotype: 1:4
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Examine the Punnett square showing the inheritance of flower color in plants.
If (R) represents the dominant color red, and (r) represents the recessive color white, what is the possibility that the two plants will have white offspring?
0%
50%
75%
100%
Tags
NGSS.MS-LS3-2
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Examine the Punnett square that shows the probable offspring of a cross between two watermelons where G represents solid green and g represents striped watermelons.
What would be the genotypes for the parents?
GG x GG
gg x gg
GG x Gg
Gg x Gg
Tags
NGSS.HS-LS3-1
NGSS.HS-LS3-2
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